What is the difference between a protocol and a named bookmark in WF4.0?

Question

An ActivityExecutionContext has three ways of creating bookmarks: CreateBookmark, CreateNamedBookmark and CreateProtocolBookmark.

1. Which one is supposed to be used for what kind of async operation?
2. What is the difference between a named and a protocol bookmark?
3. Which of the two does CreateBookmark() return and why the special case? It appears to behave like an named bookmark only without the name part judging from its behavior and Reflector.

Answer 1

As of now BETA 1 is just released and so far i have seen only examples of createNamedBookmark for async operation..

http://msmvps.com/blogs/theproblemsolver/archive/2009/07/15/more-asynchronous-work-in-windows-workflow-foundation-4.aspx

there is no documentation from MSDN for protocal framework.. so i guess only WF Core team could answer your question as of now. otherwise, you will have to wait till the next release..

http://msdn.microsoft.com/en-us/library/system.activities.activityexecutioncontext.createprotocolbookmark%28VS.100%29.aspx